Tregonhawke water quality

GREEN

designated bathing water · · South West Water

Tregonhawke is a designated bathing water in Cornwall, currently rated GREEN for swimming — No recent overflow, no pollution warning, low rainfall, no high samples. Its latest Environment Agency classification is excellent (2025), and 375 storm-overflow spills were recorded nearby in 2025. Below: live risk, recent spills, official samples, rainfall, tides and nearby reports.

Safe to swim right now?
Looking good right now
No recent overflow, no pollution warning, low rainfall, no high samples.
Do not rely solely on this website for health decisions. Check official alerts and use your own judgement. Seek medical advice if you are unwell.

Current status

Risk: GREEN No recent overflow, no pollution warning, low rainfall, no high samples.

  • Active overflows nearby: 0
  • Recent overflows (48h): 0
  • Rainfall (48h): 1.9 mm

Official EA classification

excellent (2025)

Latest official sample

2026-08-20 — E.coli 10, enterococci 10 cfu/100ml

Latest independent sample

None published

Pollution & environment data

1.9 mm
Rainfall 48h
5.3 mm
Rainfall 7d
12
Outfalls within 5 km
375
Spills (2025, official)
28
Spills 2026 so far (live)
10
Spills last 30d
high 1.67m
Tide now

Recent storm overflows nearby (30 days)

In the news nearby

No recent local news matched.

Storm-overflow spills near here, by year (EDM)

Recent spills near here (precise, SWW)

Full spill history near Tregonhawke

Download CSV

Every storm-overflow discharge Glanmor has recorded within 5 km of Tregonhawke, newest first.

29 discharge events
StartEndOutfallDistance
2026-08-25 06:482026-08-25 06:52RIVER LYNHER ESTUARY~3.5 km
2026-08-25 06:422026-08-25 06:46ST JOHNS LEAT (E)~3.3 km
2026-08-25 06:332026-08-25 06:40CAWSAND BAY (C)~3.1 km
2026-08-22 07:152026-08-22 07:30ST JOHNS LEAT (E)~3.3 km
2026-08-11 07:502026-08-11 07:52ST JOHNS LEAT (E)~3.3 km
2026-08-04 10:152026-08-04 11:45ST JOHNS LEAT (E)~3.3 km
2026-08-04 09:362026-08-04 11:28ST JOHNS LEAT (E)~3.3 km
2026-07-30 10:362026-07-30 10:38RIVER LYNHER~4.7 km
2026-07-30 08:152026-07-30 08:15ST JOHNS LEAT (E)~3.3 km
2026-07-29 09:152026-07-29 09:15ST JOHNS LEAT (E)~3.3 km
2026-07-25 08:302026-07-25 09:30ST JOHNS LEAT (E)~3.3 km
2026-07-25 08:042026-07-25 09:16ST JOHNS LEAT (E)~3.3 km
2026-07-22 16:152026-07-22 16:15RIVER LYNHER~4.7 km
2026-07-15 09:302026-07-15 10:45ST JOHN'S LAKE (ESTUARINE)~2.8 km
2026-07-15 09:012026-07-15 10:00ST JOHN'S LAKE (ESTUARINE)~2.8 km
2026-07-15 08:582026-07-17 09:15ST JOHNS LEAT (E)~3.3 km
2026-07-14 23:322026-07-14 23:34ST JOHNS LEAT (E)~3.3 km
2026-06-26 00:122026-06-26 00:13CAWSAND BAY (C)~3.1 km
2026-06-09 10:462026-06-09 10:50ST JOHNS LEAT (E)~3.3 km
2026-06-06 10:242026-06-06 12:43ST JOHN'S LAKE (ESTUARINE)~2.8 km
2026-06-06 07:542026-06-06 08:16RIVER LYNHER ESTUARY~3.5 km
2026-05-02 19:362026-05-02 19:38MILLBROOK LAKE~3.2 km
2026-05-02 14:162026-05-02 15:00CAWSAND BAY (C)~3.2 km
2026-02-26 23:202026-02-27 03:04CAWSAND BAY ESTAURINE VIA SWS~3.2 km
2026-02-18 15:542026-02-18 16:59WHITSAND BAY (C)~4.9 km
2026-02-13 18:062026-02-13 18:13MILLBROOK VIA SWS~2.1 km
2026-01-29 22:212026-01-29 22:28PLYMOUTH SOUND (ESTUARINE)~4.5 km
2026-01-23 20:402026-01-23 21:34CAWSAND BAY (C)~3.2 km
2025-10-26 21:002025-10-26 21:02RIVER LYNHER~4.7 km
39 precise spill records (duration & volume)
WhenDetailDistance
2026-08-25 06:48spill, 4 min~3.5 km
2026-08-25 06:42spill, 4 min~3.3 km
2026-08-25 06:33spill, 7 min~3.1 km
2026-08-22 09:42spill, 2 min~3.3 km
2026-08-22 07:08spill, 2 min~3.3 km
2026-08-11 07:50spill, 2 min~3.3 km
2026-08-04 09:36spill, 112 min~3.3 km
2026-07-30 10:36spill, 2 min~4.7 km
2026-07-30 08:15spill, 0 min~3.3 km
2026-07-29 09:15spill, 0 min~3.3 km
2026-07-25 08:04spill, 72 min~3.3 km
2026-07-22 16:15spill, 0 min~4.7 km
2026-07-15 09:01spill, 10 min~2.8 km
2026-07-15 08:58spill, 2824 min~3.3 km
2026-07-14 23:32spill, 2 min~3.3 km
2026-06-26 00:12spill, 1 min~3.1 km
2026-06-26 00:12spill, 1 min~3.1 km
2026-06-09 10:46spill, 4 min~3.3 km
2026-06-09 10:46spill, 4 min~3.3 km
2026-06-06 10:24spill, 139 min~2.8 km
2026-06-06 10:24spill, 139 min~2.8 km
2026-06-06 07:54spill, 22 min~3.5 km
2026-06-06 07:54spill, 22 min~3.5 km
2026-05-02 19:36spill, 2 min~3.2 km
2026-05-02 19:36spill, 2 min~3.2 km
2026-05-02 14:16spill, 44 min~3.2 km
2026-05-02 14:16spill, 44 min~3.2 km
2026-02-26 23:20spill, 224 min~3.2 km
2026-02-26 23:20spill, 224 min~3.2 km
2026-02-18 15:54spill, 65 min~4.9 km
2026-02-18 15:54spill, 65 min~4.9 km
2026-02-13 18:06spill, 7 min~2.1 km
2026-02-13 18:06spill, 7 min~2.1 km
2026-01-29 22:21spill, 8 min~4.5 km
2026-01-29 22:21spill, 8 min~4.5 km
2026-01-23 20:40spill, 54 min~3.2 km
2026-01-23 20:40spill, 54 min~3.2 km
2025-10-26 21:00spill, 2 min~4.7 km
2025-10-26 21:00spill, 2 min~4.7 km
Take action — email SWW / your MPGot ill here? Build a reportReport pollution

Water quality — 7-year trend

Water quality in 2026 was broadly level with 2025.

YearEA classificationSamplesE. coli (geo-mean)Enterococci (geo-mean)High readings
2019—1314 cfu/100ml10 cfu/100ml0
2021—2011 cfu/100ml13 cfu/100ml0
2022—2011 cfu/100ml10 cfu/100ml0
2023—2011 cfu/100ml11 cfu/100ml0
2024—1510 cfu/100ml10 cfu/100ml0
2025excellent1011 cfu/100ml10 cfu/100ml0
2026—810 cfu/100ml11 cfu/100ml0

Geometric mean of Environment Agency samples per calendar year (the standard bathing-water statistic). "High readings" are samples at or above 500 E. coli or 200 enterococci cfu/100ml.

Tregonhawke — frequently asked questions

Is it safe to swim at Tregonhawke today?

Tregonhawke is currently rated GREEN: No recent overflow, no pollution warning, low rainfall, no high samples. This is guidance only — also check official alerts and use your judgement.

Has there been a sewage spill near Tregonhawke?

375 storm-overflow spills were recorded near Tregonhawke in 2025 (EA Event Duration Monitoring), and 28 spill events have been logged nearby so far this year.

What is Tregonhawke's bathing water classification?

Tregonhawke is classified excellent for 2025 by the Environment Agency.

Data & provenance

Last updated
1 h ago (2026-08-27 15:45 UTC)
Sources
Environment Agency (samples & classification), South West Water (overflows), EA EDM (annual spills), Open-Meteo (rainfall & tide). Full list on about.
Confidence
High — official classification, 12 outfalls monitored within 5 km.
Risk model
v0.4
Download
Sample timeline (JSON) · All beaches (CSV)
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